Heavy DNA ( N15 DNA), hybrid DNA, and light DNA ( N14 DNA) can be separated by centrifugation. If cells containing N15 DNA are transferred to a medium with only N14 NH4Cl as a nitrogen source, what percent of daughter molecules are composed of hybrid DNA after 3 generations

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

If assuming tasting ptc as a simple gene trait,what other genotype would you select to put in this missing genotype box that could result in this phenotype

How are the reproductive cycles of a fungus and a pteridophyte similar? a)both organisms form fruiting bodies that produce diploid seeds. b)both organisms produce haploid spores and exhibit diploid and haploid stages. c)both organisms reproduce sexually when two haploid hyphae fuse. d)both organisms exhibit a diploid stage and are only able to reproduce asexually.